public class Course {
    private String name;
    [u]private String[] students = new String[100]; //在这里创建[/u]
    private int numberOfStudents;
    
    public Course(String name) {
        this.name = name;
          [u]  //students = new String[100]; // 或者在这里创建[/u]
    }
    public String getName() {
        return name;
    }
    
    public void addStudent(String student) {
        students[numberOfStudents] = student;
        numberOfStudents++;
    }
    
    public String[] getStudents() {
        return students;
    }
    
    public int getNumberOfStudents() {
        return numberOfStudents;
    }
}